Language:
كتاب الجنائز
23  
Funerals (Al-Janaa'iz)
(17)
Chapter: To make the hair of a (dead) woman fall at her back
(17)
باب يُلْقَى شَعَرُ الْمَرْأَةِ خَلْفَهَا
Sahih al-Bukhari 1263

Narrated Um 'Atiyya:

One of the daughters of the Prophet (ﷺ) expired and he came to us and said, "Wash her with Sidr (water) for odd number of times, i.e. three, five or more, if you think it necessary, and in the last, put camphor or (some camphor on her), and when you finish, notify me." So when we finished we informed him. He gave his waist-sheet to us (to shroud her). We entwined the hair (of the deceased girl) in three braids and made them fall at her back.

حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ، عَنْ هِشَامِ بْنِ حَسَّانَ، قَالَ حَدَّثَتْنَا حَفْصَةُ، عَنْ أُمِّ عَطِيَّةَ ـ رضى الله عنها ـ قَالَتْ تُوُفِّيَتْ إِحْدَى بَنَاتِ النَّبِيِّ صلى الله عليه وسلم فَأَتَانَا النَّبِيُّ صلى الله عليه وسلم فَقَالَ ‏ "‏ اغْسِلْنَهَا بِالسِّدْرِ وِتْرًا ثَلاَثًا أَوْ خَمْسًا أَوْ أَكْثَرَ مِنْ ذَلِكَ إِنْ رَأَيْتُنَّ ذَلِكَ، وَاجْعَلْنَ فِي الآخِرَةِ كَافُورًا أَوْ شَيْئًا مِنْ كَافُورٍ، فَإِذَا فَرَغْتُنَّ فَآذِنَّنِي ‏"‏‏.‏ فَلَمَّا فَرَغْنَا آذَنَّاهُ، فَأَلْقَى إِلَيْنَا حِقْوَهُ، فَضَفَرْنَا شَعَرَهَا ثَلاَثَةَ قُرُونٍ وَأَلْقَيْنَاهَا خَلْفَهَا‏.‏
Reference : Sahih al-Bukhari 1263
In-book reference : Book 23, Hadith 24
USC-MSA web (English) reference : Vol. 2, Book 23, Hadith 353
  (deprecated numbering scheme)